Members of Mamiraua Institute prepare to release the Amazonian manatee Helena after it healed from injuries sustained from being hunted in lake Amana in Maraa, Amazonas state, Brazil April 13, 2017. Picture taken April 13, 2017. REUTERS/Bruno Kelly

Members of Mamiraua Institute prepare to release the Amazonian manatee Helena after it healed from injuries sustained from being hunted in lake Amana in Maraa, Amazonas state, Brazil April 13, 2017. Picture taken April 13, 2017. REUTERS/Bruno Kelly